Not sure if you got this sorted out, but I have this set up. It just requires a little trick.
In camera settings, trigger > Artificial Intelligence, you can see the "to confirm," "to cancel," and "custom models" input boxes. These can be configured on a per-profile basis.
But here is the problem. When you have custom models enabled in the general settings > AI tab, it defaults all cameras, all profiles, to use all custom models in your custom models folder, except when specific models are specified in the custom models input box, separated by a semicolon. Like you, I didn't want the dark model running during the day, and I don't have any other custom models, so I have my day profile "tricked" into not using any custom profiles, by only putting a semicolon in the custom models box of my day profile. That way, it seems to break from the "use all custom models" into the "use only specified models," of which there are none listed, and the semicolon doesn't seem to cause a problem otherwise. Seems to work for me!